package com.ymj;

import com.ymj.mapper.UserMapper;
import com.ymj.pojo.User;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import java.io.IOException;
import java.io.InputStream;
import java.util.List;

public class MybatisDemo2 {
//    mybatis 的代理开发
    public static void main(String[] args) throws IOException {
//        1.加载mybatis 的核心配置文件，获取 SqlsessionFactry
        String resource = "mybatis-config.xml";
        InputStream inputStream = Resources.getResourceAsStream(resource);
        SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);

//        2.获取 sqlSession 对象，用它来执行sql
        SqlSession sqlSession = sqlSessionFactory.openSession();

//        3.执行sql
/*        List<User> users = sqlSession.selectList("test.selectAll");
        System.out.println(users);*/
//        3.1 获取UserMapper 接口的代理对象
        UserMapper userMapper = sqlSession.getMapper(UserMapper.class);
        List<User> users = userMapper.selectAll();
        System.out.println(users);

//        4.释放资源
        sqlSession.close();

    }
}
